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A240149 Number of nX3 0..3 arrays with no element equal to one plus the sum of elements to its left or one plus the sum of elements above it or one plus the sum of the elements diagonally to its northwest or zero plus the sum of the elements antidiagonally to its northeast, modulo 4 1

%I #4 Apr 02 2014 09:17:53

%S 4,8,20,67,254,825,2667,8652,27929,91436,297311,965014,3135633,

%T 10174603,33030794,107154304,347714014,1127972498,3659419980,

%U 11870924983,38508782933,124917347816,405214920992,1314447547691,4263837727610

%N Number of nX3 0..3 arrays with no element equal to one plus the sum of elements to its left or one plus the sum of elements above it or one plus the sum of the elements diagonally to its northwest or zero plus the sum of the elements antidiagonally to its northeast, modulo 4

%C Column 3 of A240153

%H R. H. Hardin, <a href="/A240149/b240149.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

%e ..3..3..2....3..3..2....2..2..3....2..2..3....3..2..3....3..2..3....2..2..3

%e ..2..1..2....2..1..1....0..2..2....0..2..1....3..2..1....3..1..2....0..2..1

%e ..0..0..3....0..0..3....0..3..3....2..0..2....2..2..3....2..1..3....2..2..2

%e ..0..2..1....0..2..2....2..2..3....0..0..2....2..0..1....2..0..2....2..1..1

%K nonn

%O 1,1

%A _R. H. Hardin_, Apr 02 2014

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Last modified March 29 02:23 EDT 2024. Contains 371264 sequences. (Running on oeis4.)